Datasheet

MAX9759
3.2W, High-Efficiency, Low-EMI,
Filterless, Class D Audio Amplifier
_______________________________________________________________________________________ 9
MAX9759
2
16
3
15
7
6, 14 4
1
µ
F
PGND
OUT+
OUT-
PV
DD
PV
DD
GND
IN+
V
DD
V
DD
18
IN-
SYNC
UVLO/POWER
MANAGEMENT
CLASS D
MODULATOR
PV
DD
9, 12
11
10
CLICK-AND-POP
SUPPRESSION
OSCILLATOR
10
µ
F*
1µF
1µF
MUTE
5
SHDN
CONTROL
V
DD
GND
R
IN
R
IN
G1
G2
BIAS
NOTE: TYPICAL OPERATING CIRCUIT DEPICTS MAX9759 IN FFM MODE WITH f
S
= 1400kHz and +18dB OF GAIN.
*BULK CAPACITANCE, IF NEEDED.
SYNC_OUT
13
R
F
R
F
Typical Operating Circuit/Functional Diagram
Typical Operating Characteristics (continued)
(V
DD
= PV
DD
= SHDN = MUTE = 5V, GND = PGND = 0V, SYNC = V
DD
(SSM), unless otherwise noted. Gain = 12dB (G1 = 0, G2 = 1).
THD+N measurement bandwidth: 22Hz to 22kHz. Typical values are at T
A
= +25°C.) (See Typical Operating Circuit)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9759 toc33
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.5
5.04.54.03.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
4.5
3.0
FFM
T
A
= +85
°
C
T
A
= -40
°
C
T
A
= +25
°
C
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9759 toc34
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5.35.14.94.7
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
0.20
0
4.5 5.5
T
A
= +85
°
C
T
A
= +25
°
C
T
A
= -40
°
C
FFM
PACKAGE TEMPERATURE
vs. TIME
MAX9759 toc35
TIME (s)
PACKAGE TEMPERATURE (°C)
25020015010050
10
20
30
40
50
60
0
0300
R
L
= 8
Ω
AT 10% THD+N
R
L
= 4
Ω
AT 10% THD+N
R
L
= 3
Ω
AT 10% THD+N
MAX9759EVKIT
FREE AIR
T
A
= +25
°
C
f
IN
= 1kHz SINE WAVE